Merge branch 'void_param_in_help' of /git/repositories/knot

src/knot/ctl/knotc_main.c

src/knot/main.c

src/utils/dig/dig_params.c

src/utils/host/host_params.c

src/utils/nsupdate/nsupdate_params.c

src/zscanner/test/zscanner-tool.c